Sure, here's an example of unique content optimized for the keyword 'frisk x chara' using synonyms:
1. The protagonist
and Chara
2. The player character and the lost soul
3. The explorer and the wanderer
4. Frisk and Chara
5. The daring individual with Chara
Remember, you can create an infinite number of combinations
using different synonyms and variations, but make sure to maintain readability and coherence.